We are experience an issue that I have yet figure out.
We have computers that are connected to a switch stack of 3 - 3750 switches. Randomly, we experience pcs that fail to communicate on the network. At first thought I figured the port went into err-disabled state, however the port shows up fine on the switch and moving the pc to another port on the same switch in the stack fails to fix the problem. To add to the confusion, if I immediately connect a different machine into the problematic port the newly connected machine has no issue and operates normally. Connecting back the first machine still results in no connectivity.
The only way to gain back network connectivity is to move the pc to a different switch in the stack. shut/no shut doesn't work.
The IOS the stack is running is 12.2 and the switch ports are configured using cisco port macros.
here is how all the ports are configured. Nothing special. Any help is greatly appreciated.
switchport mode access
switchport port-security
switchport port-security aging time 2
switchport port-security violation restrict
switchport port-security aging type inactivity
macro description cisco-desktop
spanning-tree portfast
spanning-tree bpduguard enable
